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The gas composition of ordinary air is: a) 15% oxygen, 20% nitrogen, 5% other b) 20% oxygen, 75% nitrogen, 5% other c) 21% oxygen, 78% nitrogen, 1% other d) 24% oxygen, 79% nitrogen, 3% other e) 26% oxygen, 81% nitrogen, 3% other 2. Compressed air in a scuba tank filled to capacity, compared to
ordinary arie, has: a) the same composition b) a greater percentage of oxygen c) a greater percentage of nitrogen d) a greater percentage of both oxygen and nitrogen e) varying...